Remove Shebang functionality from Known Issues

Author: shockey

README.md

@@ -67,7 +67,6 @@ To help with the migration, here are the currently known issues with 3.X. This l
 
 - Only part of the [parameters](#parameters) previously supported are available.
 - The JSON Form Editor is not implemented.
-- Shebang URL support for operations is missing.
 - Support for `collectionFormat` is partial.
 - l10n (translations) is not implemented.
 - Relative path support for external files is not implemented.